Doing some quick math, the transistor will have a base current of 5 milliamps, which a Pi should be able to supply. At a fairly typical beta of 100, the transistor could drive the fan at up to .5 amps, which is plenty for a small fan. A MOSFET transistor is generally better suited for switching high current loads, but for this a BJT (as drawn) should be fine.
its a running joke in 196 communities that the only rule is to post before you leave. people are just letting everyone know they’re following that rule
I thought I also saw, at some point, a post saying the only rule was your post had to have “rule” somewhere in the title. (Probably in response to people making their required one post and already putting rule in the title). And after that I feel like I saw a lot more posts with rule in the title.
I’m pretty certain it’s not a rule there, everyone just kind of assumes it’s what you’re meant to do when they post, because they see every other post.
Kind of a self enforcing unofficial rule, I guess?
The point of the diode is to prevent reverse current that gets induced when a (brushed) motor is turned off. It essentially turns into a small generator while spinning down, and the diode essentially short circuits that. It prevents damage to the rest of the circuit. If that motor is brushless (with an integrated control board), you likely won’t need it but it doesn’t do any harm either.
Communities usually named 195 or 196 have a rule that if you go there you have to post something. So people will post something and title it “Rule.” And it leads to a bunch of low effort crap posts.
Just block any 195 and 196 communites to save your feed from getting overwhelmed with bad posts.
Even though, I am no fun of low effort content, there is so few active community that it’s a bit refreshing to see content, even low effort, also they spread to much over Lemmy, that looks like it’ll contaminate lemmy’s culture which is great to become something else than redditfugees
My subscription feed isn’t big enough yet for me to just scroll through that so I’ve been dipping in and out of… I was about to say /r/all but whatever the Lemmy word for that is, and there seems to be a new dumb community flooding my feed every day - yesterday it was 196, today it was weirdgirlmemes. I just block them and carry on
I completely agree, but I would ascribe a lot of it to teething of an early platform. Narwhals and bacon once dominated that other site in the early days lol
I like it too. Back in Reddit I never saw/heard about that community. I have grown fond of their humor here on Kbin. It gets at least a couple of laughs a day, and I've even laughed out loud on some occasions.
Every post on a chan-style imageboard has a number. If the last two digits are the same, it’s “dubs.”
Now imagine a million threads full of nothing but people trying to get dubs on their comment. Yeah, it’s really that stupid.
The creator of 4chan (moot) turned them off at some point (as in, it would skip any number with dubs, but not trips or above), but right before he sold 4chan he turned them back on.
On a KISS basis - I tend to just use a bimetallic switch or omit the temperature control and just run the fan from power up. It’s possible for a processor to suffer some non-handled exception where it no longer executes the temperature management routine.
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